The Lince incorporates all the design features of the Matrix, but is done in a low volume version. The internal volume of the mask is exceptionally low, lower than many well-known scuba-diving masks and the weight is also very moderate. Two pressure buckles integrated into the frame make strap adjustment quick and precise. This new design strap has a very broad purchase on the neck for magnificent comfort. Excellent mask for snorkeling, scuba diving and skin diving.To get the best fitting mask, we offer a 14 day trial on all masks, if your mask doesn't fit or if it leaks return it for another. You do need to provide us with your receipt of purchase, any difference in value will need to be met by the purchaser, and this includes freight as well.